LedgerSMB is an accounting and ERP framework which aims to provide solid accounting, industry-leading security, and support for rapid development of business tools re-using accounting logic to support workflows of any specific business.

GnuCash allows you to track bank accounts, stocks, income, and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports. It is backed by an active development community and is blossoming into a full-fledged accounting system.

Dolibarr is a simple Web application with ERP and CRM capabilities. It is designed for small and medium companies, freelancers or foundations, and can be used to deal with all things you require to manage your activities, such as management of products, stocks, commercial proposals, invoices, orders, members of a foundation, and mailings. A single executable that installs the server and database
is available for people with no technical knowledge.

OTS is an easy program for calculating personal income tax form entries and taxes-owed or refund due. It handles forms such as US-Fed-1040, with Schedules A, B, C, and D, forms 8829 and 8849, AMT worksheets, and state income taxes for several large states.

NolaPro is a free Cloud Accounting suite that can be securely run from your PC. Refine and manage your business with its flexible and powerful Customer tracking, Billing, Payables, General Ledger, and Reporting features. Optional modules include Inventory Control, Service/Labor Order management, POS/Fulfillment Order support, a B2B Web portal, eCom Shopping Cart, vTiger add-on, Employee Timeclock, QuickBooks converter, development API, and many more. White Label partner revenue versions are available for CPAs, VARs, and consultants. For international users, it offers multi-currency, VAT/GST support, multi-language capability, and currency, decimal, and temperature flexibility. However NolaPro's customization is its best feature. It can be modified upon request to fit any industry spec or business requirement, as well as integrated with most 3rd party applications to provide backend accounting support. Secure Business Cloud hosting and a Linux version are also available.

jGnash is a personal finance application written
in Java. Java 7 is required. jGnash supports several account types, including investment accounts. It has support for split transactions, nested accounts, scheduled transactions, commodities, and currencies. It can import OFX and QIF files, excluding investment accounts and transactions. Data is stored in an XML format so it is easy to manipulate and read the data external to the program. jGnash also has scripting support to add custom reports and functionality.